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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) - USD ($) $ in Millions | Jun. 30, 2018 | Dec. 31, 2017 | Dec. 31, 2015
--- | --- | --- | ---
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |
Equity Method Investments | $ 0.1 | $ 0.6 |
Cost Method Investments | $ 9.2 | $ 6.5 |
Gentry Home Loans L L C |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |
Percentage of equity method investment ownership interest | 50.00% |  |
Pacific Access Mortgage L L C |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |
Percentage of equity method investment ownership interest | 50.00% |  |
Haseko Home Loans L L C |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |
Percentage of equity method investment ownership interest | 50.00% |  |
Island Pacific HomeLoans, LLC |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |
Percentage of equity method investment ownership interest | 50.00% |  |
Primary Beneficiary | One Hawaii HomeLoans, LLC |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |
Ownership interest acquired |  |  | 50.00%

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